- Industry: Aviation
- Number of terms: 16387
- Number of blossaries: 0
- Company Profile:
Aviation Supplies & Academics, Inc. (ASA) develops and markets aviation supplies, software, and books for pilots, flight instructors, flight engineers, airline professionals, air traffic controllers, flight attendants, aviation technicians and enthusiasts. Established in 1947, ASA also provides ...
An ammeter used to measure the radio-frequency (RF) alternating current flowing in a circuit. The RF current flows through a short piece of resistance wire and heats it. The amount the wire is heated is proportional to the square of the current flowing through it.
A thermocouple is welded to the center of the resistance wire, and a DC ammeter measures the current produced by the thermocouple. This current is proportional to the temperature of the resistance wire. The dial of the thermocouple instrument is calibrated in amps of RF alternating current.
Industry:Aviation
An amplifier used to isolate one circuit from another circuit. Buffer amplifiers prevent one circuit from loading the other and causing it to operate improperly.
Industry:Aviation
An amplifier with two inputs and one output. The signal on the output is an amplification of the difference between the signals on the two inputs.
Industry:Aviation
An AN442 rivet used on the inside of an aircraft structure where it is not exposed to the airflow. Flathead rivets are often used because they are easy to install with automatic riveting machines.
Industry:Aviation
An aneroid barograph designed to record atmospheric pressure changes of very small magnitudes.
Industry:Aviation
An aneroid barometer whose dial is calibrated in feet or meters above a reference pressure level.
An altimeter measures the difference between the pressure of the air surrounding it and a reference pressure which is set on the barometric pressure dial on the face of the instrument. This pressure difference is expressed in feet or meters.
Industry:Aviation
An aneroid-operated valve in the overboard vent line of the lubrication system of some turbine engines.
The breather-pressurizing valve is open at sea level, but closes with increasing altitude to maintain sea level pressure inside the vent system as the aircraft goes up in altitude.
Industry:Aviation
An angle equal to one sixtieth of a degree. A complete circle is made up of 360 degrees, or 21,600 minutes.
Industry:Aviation
An angle formed in sheet metal which has been bent through more than 90°.
When a piece of sheet metal is bent through 135°, it forms a closed angle of 45°.
Industry:Aviation
